Fe-Cr합금의 공식저항성 평가를 위하여 다양한 규격(KS D 0238, ASTM G 61, ISO 17475)에 따라 실시한 동전위 분극 시험과 임계공식온도 측정시험

• Published in: 대한금속·재료학회지, 47(10) pp. 635 - 643
• Main Authors: 강수연, 이재봉, 김영호
• Format: Journal Article
• Language: Korean
• Published: 대한금속·재료학회 01.10.2009
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241

The resistance to pitting corrosion of Fe-Cr alloys was evaluated by performing potentiodynamic polarization and critical pitting temperature (CPT) tests. For the potentiodynamic polarization tests, various standards were applied, i.e., KS D 0238 (wet, dry), ASTM G 61, and ISO 17475, showing different potentiodynamic polarization results including pitting potentials. ASTM G 61 and ISO 17475 standards presented relatively higher pitting potential while KS D 0238 (dry) indicated lower values than the others. Effects of surface roughness, scan rates, and exposure time to air before tests were also investigated. CPT tests were performed under two different applied potentials, 300 mVSCE and 200 mVSCE in deaerated 1 M NaCl aqueous solution. CPT values and the polarization test results showed a linear relationship. KCI Citation Count: 0